ok guys i have now driven my CC6 Germany 2019 around 2800 KMs and the feedback is positiive as compared to the initial havoc i reported on day 1.
there can be multiple reasons, may be i have become used to the new hardness and bounce or may be tyres have improved reasonably.
however recently i have started feeling comfortable with CC6 however regarding being totally noiseless is a false claim by continental.
CC6 make noise comparable to any other brand comfort tyres.